By packing the structure we can remove a few holes as Jamal
suggests.
before:
struct tc_cls_u32_knode {
struct tcf_exts * exts; /* 0 8 */
u8 fshift; /* 8 1 */
/* XXX 3 bytes hole, try to pack */
u32 handle; /* 12 4 */
u32 val; /* 16 4 */
u32 mask; /* 20 4 */
u32 link_handle; /* 24 4 */
/* XXX 4 bytes hole, try to pack */
struct tc_u32_sel * sel; /* 32 8 */
/* size: 40, cachelines: 1, members: 7 */
/* sum members: 33, holes: 2, sum holes: 7 */
/* last cacheline: 40 bytes */
};
after:
struct tc_cls_u32_knode {
struct tcf_exts * exts; /* 0 8 */
struct tc_u32_sel * sel; /* 8 8 */
u32 handle; /* 16 4 */
u32 val; /* 20 4 */
u32 mask; /* 24 4 */
u32 link_handle; /* 28 4 */
u8 fshift; /* 32 1 */
/* size: 40, cachelines: 1, members: 7 */
/* padding: 7 */
/* last cacheline: 40 bytes */
};
Suggested-by: Jamal Hadi Salim <j...@mojatatu.com>
Signed-off-by: John Fastabend <john.r.fastab...@intel.com>
---
include/net/pkt_cls.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 59789ca..2121df5 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -360,12 +360,12 @@ tcf_match_indev(struct sk_buff *skb, int ifindex)
struct tc_cls_u32_knode {
struct tcf_exts *exts;
- u8 fshift;
+ struct tc_u32_sel *sel;
u32 handle;
u32 val;
u32 mask;
u32 link_handle;
- struct tc_u32_sel *sel;
+ u8 fshift;
};
struct tc_cls_u32_hnode {
